%!TEX program = xelatex
\documentclass[t,12pt,aspectratio=169]{beamer} % 16:9 宽屏比例，适合现代投影
%\usepackage{ctex} % 中文支持
\usepackage{amsmath, amsthm, amssymb, bm} % 数学公式与符号
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage{color}

% 使用衬线字体（可选）
%\usefonttheme{serif}
%\usefonttheme{default}

% 或者更彻底地使用 Latin Modern 数学字体（需 lualatex/xelatex）
\usepackage{unicode-math}
%\setmainfont{Latin Modern Roman}
\setmathfont{Latin Modern Math}

% 设置段落间距
\usepackage{setspace}
\onehalfspacing
\setlength{\parskip}{1em}  % 增加段落之间的间距为1em

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% 每页增加与上面标题行的距离
\addtobeamertemplate{frametitle}{}{\vspace*{0.7em}}

% 主题设置（推荐简洁风格）
\usetheme{Madrid}
\usecolortheme{default} % 可选：seahorse, beaver, dolphin 等

%\linespread{1.3}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% 信息设置
\title{Chapter 01: }
\author{AB ET AL}
%\institute[XX大学]{XX大学\quad 数学与统计学院\quad 数学与应用数学专业}
%\date{2025年10月}

\begin{document}

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% 封面页
\begin{frame}
  \titlepage
\end{frame}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% 目录页
\begin{frame}{Contents}
  \tableofcontents
\end{frame}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Section 1
\section{} %%1
\begin{frame}[allowframebreaks]{A. }

\vspace{-0.4cm}





\end{frame}

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\end{document}



